N.Y. Comp. Codes R. & Regs. tit. 22, § 500.26
(3) Within the time directed by the clerk of the court, appellant shall file:
(4) Within the time directed by the clerk of the court, respondent shall submit 10 copies of its Appellate Division brief, and may submit an original and nine copies of a letter in opposition with proof of service of one copy on each other party.
(b) Motions for permission to appeal.
(3) Within the time directed by the clerk of the court, movant shall file:
(a) Appeals as of right or by permission of the Appellate Division.